A minimum of 100 birds (or 1% of the population whichever is
larger) should be weighed each time. If birds are sexed then
a minimum of 100 birds (or 1% of the population) of each sex
should be weighed. Birds should be sampled from at least
3 points within each house (or sexed pen if growing sexes
separately), away from doors and walls (Figure 50). Calmly and
correctly pick up each bird, and place it in to the shackles, wait
until it is still and record the weight from the scale. Release the
bird back into the main house area. All birds in the catching pen
must be weighed to eliminate selective bias. Once all sample
birds have been weighed in the house, calculate average live
weight and CV% for each house